Results 61 to 70 of about 1,131 (107)
Measurements of Velocity and Attenuation of Ultrasonic Pulses in Textile Fibers
Oyo Buturi, 1969 MORI, Hideo +3 more
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Mixture Design of Concrete Using Ultrasonic Pulse Velocity
International Journal of Civil Engineering, 2019This article discusses the possibility of using ultrasonic pulse velocity (UPV) as a performance parameter for concrete design. Experimental values of UPV were determined for 68 mix design of concrete with different types of binders. Portland cements with fly ash, blast furnace and silica fume were investigated.
Eduardo Pereira, R A Medeiros-Junior
exaly +2 more sources
Ultrasonic pulse velocity for mechanical properties determination of wood
Wood Material Science and Engineering, 2023Vahab Toufigh, Soheil Palizi
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Ultrasonic pulse velocity as a rock stress sensor
Tectonophysics, 1974A method of measuring with nanosecond precision the times of flight of ultrasonic pulses over distances of a few metres in rock in situ has been developed by using a multiple sampling technique, with pulses repeated at intervals of 20 msec and on-line averaging of many individual readings. In an ideal situation the measurements are sensitive to changes
Gladwin M.T., Stagey F.D.
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Image matching for pulse echo measurement of ultrasonic velocity
Image and Vision Computing, 1983Abstract Diagnostic ultrasound is a pulse echo imaging system similar to radar, sonar or exploration seismology. It has its most widespread use in the examination of pregnancy, but also finds routine use in the examination of the organs of the upper abdomen and its use is increasing in other areas. Using current techniques the information obtained is
D. E. Robinson +2 more
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Dispersion of Ultrasonic Pulse Velocity in Cylindrical Rods
The Journal of the Acoustical Society of America, 1955The velocities of pulsed longitudinal and shear waves in cylindrical rods of aluminum alloy, brass, copper, and steel were measured by using both the pulse echo and pulse transmission methods. It is found that for pulsed longitudinal waves the measured velocity not only depends upon the elastic constants of the medium but also on the ratio between the ...
L. Y. Tu, J. N. Brennan, J. A. Sauer
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Effect of stresses on the ultrasonic pulse velocity in concrete
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1991Since the stress-strain curve of a concrete is not linear, at least under the first loading, one would expect that the presence of stresses would reduce the velocity of ultrasonic pulses in the concrete. The experimental investigation of this expectation is the topic of this paper.
Sandor Popovics, John S. Popovics
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Ultrasonic Pulse Velocity Tests on Compacted Soil
Characterization, Modeling, and Performance of Geomaterials, 2009In this paper, results of a series of ultrasonic pulse velocity tests on compacted soil were presented and discussed. Ultrasonic pulse velocity tests provide compression and shear wave velocity information that can be used in calculating dynamic elastic moduli such as Young’s modulus and shear modulus.
David M. Weidinger +2 more
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The Dispersion of Ultrasonic Pulse Velocity in Cylindrical Rods
The Journal of the Acoustical Society of America, 1954Velocity dispersion of compressional stress waves in cylindrical rods of 61S-T6 aluminum alloy has been investigated experimentally. Electronically generated pulses of the desired shape and carrier frequency were used to drive the barium titanate and quartz transducers. Both the pulse echo and pulse transmission methods were employed. It was found that
L. Y. Tu, J. N. Brennan, J. A. Sauer
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Measurement of ultrasonic velocity with improved accuracy in pulse echo setup
Review of Scientific Instruments, 2007In the present work a personal computer based circuit adopted in pulseecho setup has been developed for the measurement of time-of-flight between the two successive echoes using a differential time measurement with a 16bit counter and an external clock frequency of 32MHz.
S, Rajagopalan, S J, Sharma, P K, Dubey
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